Walmart’s traditional obsession with efficiency is no longer just a matter of saving money. Greening retail has become a true double entendre, with carbon and cash both essential to figuring out how to remove 1 billion tons of greenhouse gas emissions from its extended supply chain by the end of the next decade.

The commitment is more than just an audacious goal. Walmart’s omnichannel fulfillment ecosystem has been modeled in detail by Bain & Company with compelling results that all retailers and most manufacturers should understand.